Mason jar lid



FIG. 1 is a top front perspective view of a mason jar lid showing our new design;

FIG. 2 is a bottom rear perspective view thereof;

FIG. 3 is a bottom front perspective view thereof;

FIG. 4 is a front elevation view thereof;

FIG. 5 is a rear elevation view thereof;

FIG. 6 is a right side elevation view thereof;

FIG. 7 is a left side elevation view thereof;

FIG. 8 is a top plan view thereof; and,

FIG. 9 is a bottom plan view thereof.

The dashed broken lines in the figures illustrate portions of the mason jar lid that form no part of the claimed design. 

CLAIM The ornamental design for a mason jar lid, as shown and described. 